Burkitt LymphomaAntigens, CD20B-LymphocytesSialic Acid Binding Ig-like Lectin 2Lymphoma, B-CellReceptors, Antigen, B-CellSomatic Hypermutation, ImmunoglobulinAntibodies, Monoclonal, Murine-DerivedHerpesvirus 4, HumanTumor Cells, CulturedApoptosisCell LineRadioimmunotherapyCell Line, TumorLymphoma, Non-HodgkinAntibodies, MonoclonalImmunoglobulin MLymphomaImmunoglobulin Variable RegionMolecular Sequence DataProto-Oncogene Proteins c-bcl-2Base SequenceFlow CytometryProtein-Tyrosine KinasesSignal TransductionAntineoplastic AgentsRecombinant ProteinsPhosphorylation